The effect of adding several levels and timings of humic and fulvic acids on some characteristics of barley yield
DOI:
https://doi.org/10.59658/jkas.v13i1.5706Keywords:
Barley, Humic Levels, Application timesAbstract
A field experiment was conducted at Al-Dawwar Research Station, Agricultural Research Directorate, located in Anbar province, Ramadi city during the 2024–2025 agricultural season, The aim is to determine the optimal concentration levels of humic and fulvic acids, the most suitable planting dates for their application, and the relationship of this to grain yield. The experiment was carried out using a Randomized Complete Block Design (RCBD) with three replications. Treatments consisted of three concentrations of humic and fulvic acids (0.5%, 1.0%, and 2.0% of organic matter) applied at three distinct growth stages: pre-sowing, stem elongation, and flowering. Yield and its components were assessed, including: number of spikes per m², number of grains per spike, 1000-grain weight (g), grain yield (ton ha⁻¹), and biological yield. The results indicated that the 2%concentrations of humic and fulvic acids yielded the highest averages for number of spikes, tillers, 1000-grain weight, total grain yield, and biological yield (406.4 spikes·m⁻², 4.32 tillers plant, 50.59 g, 3.919 t·ha⁻¹, and 15.15 t·ha⁻¹, respectively). Moreover, the results showed that application at the flowering stage produced the highest averages for number of spikes, number of tillers, 1000-grain weight, total grain yield, and biological yield, with values of (380.3 spikes·m⁻², 3.98 plants, 47.64 g, 3.641 t·ha⁻¹, and 14.33 t·ha⁻¹, respectively). Meanwhile, the interaction between humic and fulvic acids at a concentration of 2%, applied at the flowering stage, yielded the highest values for the studied traits.
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Copyright (c) 2026 Copyright (c) 2024 is the Author's article. Published by the Journal of Kerbala for Agricultural Sciences under a CC BY 4.0 license
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